The Implementation of a Server for a Distributed Class Algebra Database System

Abstract

We have implemented a class algebra database server with a distributed client/server architecture. This includes a nice object-oriented structure, an easy-to-use interface, an Offset Table that hides object storage, and objects including User objects, Class objects and standard objects. These objects are serialized onto persistent storage. In order to solve the single inheritance problem of the Java language, we have designed an LClass structure that meets the needs of multiple inheritance for class algebra. For improving performance on searches, an Inverted Attribute/Relation Table has been created. Also a clear interface which includes add/get/set/delete/change/invoke methods of classes, relations and attributes, and a class algebra query language has been provided for the client.